There’s no need to even ask them out right away. Just having a casual conversation and making them speak of their interests can warm them to you.
Are they your coworker? Sigh at how needy clients are, tell how you want to have a break, ask what they want to do when they have them. Discuss details.
A cinema worker is harder, but you can play a dummy and ask them if they see the movies screened there and can vouch for some of them or if they can suggest some snack from a bar, to break the ice.
People like talking about themselves. All have hilarious stories to tell. One needs to make them open up and react in a supportive way. Looking up interviewers on youtube can get one a better idea of how it’s done than these greesy pick-up artists. Genuinely enjoying a conversation rather than being hungry for a pussy\dick and making it all about yourself is a great start.